JP3059856B2 - Storage room - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a storage cabinet for keeping food at a predetermined high temperature by heating a storage room surrounded by heat insulating walls.

[0002]

2. Description of the Related Art Conventionally, this kind of storage has a storage room formed in an insulated box formed of heat insulating walls, and the storage room is heated by warm air from a heater or the like.
It is configured to keep food and the like warm at a predetermined high temperature such as ° C. By the way, as a heat insulating material of a heat insulating wall, a foam heat insulating material such as a foamed polyurethane as shown in Japanese Utility Model Publication No. 46-12766 has been generally used. The temperature is as low as about + 60 ° C., and there is a problem that deformation and deterioration occur at the high temperature as described above.

[0003] Therefore, as a heat insulating material for the heat insulating wall in this kind of storage room, for example, Japanese Utility Model Publication No.
A high-temperature-resistant heat-insulating material such as glass wool as disclosed in Japanese Patent Application Laid-Open No. H10-209,004 is used. This glass wool has a high heat-resistant temperature, so that even if the temperature in the storage chamber becomes high as described above, no inconvenience such as deformation occurs.

[0004]

However, since the heat-resistant heat-insulating material such as glass wool has a higher thermal conductivity than the foamed heat-insulating material, a large amount of heat is radiated from the storage room to the outside of the refrigerator. There are problems that the outer surface of the heat insulating box becomes hot and that the power consumption of the heater increases. In order to ensure the same heat insulation performance as that of the foamed heat insulating material, there arises a problem that the thickness of the heat insulating wall is increased and the storage room volume is thereby reduced. Furthermore, since the heat insulating material such as glass wool does not have an action of bonding to the surface material constituting the heat insulating wall like the foam heat insulating material such as foamed polyurethane, the strength of the heat insulating wall is remarkably higher than that of the foam heat insulating material. There was also a problem of lowering.

The present invention has been made to solve the above-mentioned conventional technical problem, and has as its object to improve the heat insulating performance and strength of a heat insulating wall of a refrigerator.

[0006]

The heat storage 1 of the present invention is for heating the inside of the storage room 16 surrounded by heat insulating walls, and comprises a heat insulating wall (heat insulating box 2, doors 3, 4). Is the outer surface material 11,
11A, inner surface materials 12 and 12A facing the storage room 16,
Intermediate members 13 and 13A arranged between the inner surface members 12 and 12A and the outer surface members 11 and 11A;
A and a high-temperature resistant heat insulating material (glass wool) 14 filled between the inner surface materials 12 and 12A, and a foam heat insulating material filled between the middle surface materials 13 and 13A and the outer surface materials 11 and 11A by an in-situ foaming method ( (Foamed polyurethane) 15.

[0007]

According to the refrigerator 1 of the present invention, the inner surfaces 12 and 12A and the inner surfaces 13 and 13A of the heat-insulating walls (heat-insulating box 2, doors 3 and 4) facing the storage room 16 where the temperature becomes high. Is filled with a high temperature resistant heat insulating material (glass wool) 14, and
Since the foamed heat insulating material (foamed polyurethane) 15 is filled between 3, 3A and the outer surface materials 11, 11A, all of the high temperature resistance between the inner surface materials 12, 12A and the outer surface materials 11, 11A of the heat insulating wall is provided. The heat insulating performance of the heat insulating wall (heat insulating box 2, doors 3, 4) can be significantly improved as compared with the case where the heat insulating material is filled. Therefore, the thickness of the heat insulating wall is reduced and the storage room 1 is reduced.
6 can be expanded, and the outer surface material 11,
11A is also prevented from becoming hot.

Further, the inner surface materials 12, 12A and the middle surface material 13,
Due to the heat insulating effect of the high temperature resistant heat insulating material (glass wool) 14 filled between the inner surface material 13 and 13A, the temperature of the inner surface materials 13 and 13A decreases to the heat resistant temperature of the foamed heat insulating material (foamed polyurethane) 15. 13, 13A and outer surface material 11, 1
There is no inconvenience such as deformation of the foamed heat insulating material (foamed polyurethane) 15 between 1A. In particular, the inner facing materials 13, 13
A and a foam insulation material (polyurethane foam) 15 are filled between the outer surface materials 11 and 11A by an in-situ foaming method and adhered to them. Thus, the strength of the heat insulating wall (the heat insulating box 2, the doors 3, 4) is also improved. Furthermore, high temperature resistant heat insulating material (glass wool) 1
Since the inner surface materials 13 and 13A are interposed between the foam insulating material 4 and the foamed heat insulating material (polyurethane foam) 15, the pressure at the time of filling the foamed heat insulating material (foamed polyurethane) 15 by in-situ foaming causes high temperature resistance The heat insulating material (glass wool) 14 is also prevented from being crushed, whereby the heat insulating performance of the high temperature resistant heat insulating material (glass wool) 14 is ensured, and the heat insulating wall (heat insulating box 2, doors 3, 4) is formed. It becomes possible to maintain a uniform thickness.

[0009]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal sectional side view of a refrigerator 1 according to an embodiment of the present invention, FIG. 2 is a perspective view of the refrigerator 1, and FIG. 3 is a perspective view of the refrigerator 1 with doors 3 and 4 opened. . The storage room 1 of the embodiment is used for storing dishes cooked in a hotel kitchen, for example, and transporting the food to a banquet hall while keeping the temperature warm. 2, two upper and lower heat insulating doors 3 and 4 as heat insulating walls for opening and closing the front opening of the heat insulating box 2 and a moving wheel 6 attached to the bottom surface of the heat insulating box 2. Have been.

A thermometer 7 is attached to the upper front of the heat insulating box 2, and a control panel 8 is provided at the lower front of the front. As shown in the enlarged cross-sectional views of FIGS. 1 and 4, the heat-insulating box 2 includes a box-shaped steel plate outer surface material 11 opened forward,
It is stored at a predetermined interval inside the outer surface material 11,
A box-shaped steel plate inner surface material 12 opened to the front, and a steel plate middle surface material 13 disposed between the inner and outer surface materials 12 and 11,
Glass wool 14 as a high-temperature resistant heat insulating material filled between the inner surface material 12 and the inner surface material 13, the inner surface material 13 and the outer surface material 1
1 and foamed polyurethane 15 as a foamed heat insulating material filled by an in-situ foaming method.

Inside the inner surface material 12 of the heat-insulating box 2, a storage room 16 surrounded by the inner surface material 12 is formed, and a plurality of steps for mounting the lunch box by the shelf rails 17 on both sides in the storage room 16 are provided. Of shelves 18 are installed. Storage room 16
A duct plate 19 extending vertically is provided between the inner surface material 12 and the shelf 18 at a distance from the inner surface of the back wall of the inner surface material 12, and a warm air passage 21 is formed inside the duct plate 19. You. Further, a plurality of discharge ports 22 are formed in the duct plate 19 behind the space on each shelf 18.

Similarly, as shown in FIG. 4, the doors 3 and 4 also include a steel plate outer member 11A, a steel plate inner member 12A connected to the inside of the outer member 11A at a predetermined interval, and An inner surface material 13A made of a steel plate disposed between the inner and outer surface materials 12A and 11A, the same glass wool 14 filled between the inner surface material 12A and the inner surface material 13A, and a middle surface material 13A and an outer surface material 11A. And a foamed polyurethane 15 similar to that described above, which is filled with an in-situ foaming method.

On the other hand, a handle 23 for movement is formed in the side surface of the heat insulating box 2 so as to be recessed, and a machine room 24 is formed behind the control panel 8 below the heat insulating box 2. A blower 26 and an electric heater 27 for heating are provided in the machine room 24, and a suction port 28 communicating with the inside of the storage chamber 16 and an outlet 29 communicating with the warm air passage 21 are formed on the upper surface thereof. Have been. A humidifying tray 31 is further disposed above the heater 27, and the upper surface storing the humidifying water faces the inside of the storage chamber 16. The blower 26 and the heater 27 are configured to operate or generate heat by receiving power supplied from a commercial power supply from a power plug 32.

The operation of the above configuration will now be described. In the above-mentioned kitchen, the power plug 32 of the refrigerator 1 is connected to a commercial power supply, thereby supplying power to the blower 26 and the heater 27. When electricity is supplied to the blower 26 and the heater 27 of the refrigerator 1, the heater 27 generates heat, and the warm air whose temperature has increased thereby is blown out by the blower 26 as shown by an arrow in FIG.
9 is blown into the warm air passage 21. The warm air blown out to the warm air passage 21 is discharged from each discharge port 22 into the storage room 16, heats the inside, and then is drawn into the machine room 24 from the suction port 28 through the front end of the lowermost shelf 18. become.

The interior of the storage chamber 16 is heated by the forced circulation of the warm air. However, when the temperature in the storage chamber 16 rises to, for example, + 82 ° C., the control device (not shown) cuts off the power supply to the blower 26 and the heater 27 and increases the temperature to + 78 ° C. Is controlled so as to be re-energized when the temperature drops to a lower temperature, so that the inside of the storage room 16 is maintained at a high temperature of + 80 ° C. on average. Thereafter, the dishes cooked in the kitchen are stored on the shelf 18 of the storage room 16, the power supply plug 32 is unplugged, and the refrigerator 1 is moved to the banquet room. To restart the heating operation. And, according to the progress of the banquet, the food is served at the right time.

By operating the heater 27 and the blower 26, the inside of the storage room 16 is set to a high temperature such as + 80 ° C. on average, so that the stored food can be kept delicious without being cooled until it is provided. Also, while moving, the heater 27 and the blower 26 are stopped, but it is a short time,
In addition, since the temperature drop of the storage room 26 is suppressed by the heat insulating effect of the heat insulating box 2, there is no problem. In addition, heater 2
Since the humidifying dish 31 is also heated by the heat generated by the humidifier 7, the humidifying water evaporates, whereby the inside of the storage room 16 is humidified to a predetermined humidity. Therefore, it is possible to prevent the food being dried from being dried and keep the food more delicious.

As described above, the inside of the storage room 16 is + 80 ° C. on average.
For example, the inner surfaces 12 and 12A facing the storage chamber 16 are heated to a temperature of + 80 ° C. or higher when the temperature is high. However, the glass wool 14 that is filled between the inner surface materials 12 and 12A and the outer middle surface materials 13 and 13A is a high-temperature resistant heat-insulating material, and since the heat resistance temperature is high, the temperature of the inner surface materials 12 and 12A is affected. No deformation or deterioration occurs even at high temperatures. Then, the inner surface materials 13, 13A and the outer surface materials 11, 11A
Are filled with foamed polyurethane 15 having low thermal conductivity, so that the inner surface materials 12 and 12A and the outer surface materials 11 and 1
The heat insulating performance of the heat insulating box 2 and the doors 3 and 4 is remarkably improved as compared with the case where all the glass wool is filled between 1A. Therefore, the thickness of the heat insulating box 2 and the doors 3 and 4 can be reduced to increase the volume of the storage room 16. This also prevents the external members 11 and 11A from becoming abnormally hot, and reduces the power consumption of the heater 27.

Also, the inner surface materials 12, 12A and the middle surface material 13,
Due to the heat insulating effect of the glass wool 14 filled between the inner surface materials 13 and 13A, the temperature of the inner surface materials 13 and 13A is reduced to about + 60 ° C.
The disadvantage that the foamed polyurethane 15 between 1A and 1A is deformed or deteriorated is also prevented. In particular, the foamed polyurethane 15 filled between the inner surface material 13 and 13A and the outer surface material 11 and 11A
Are bonded to them, so that the strength of the heat insulating box 2 and the doors 3 and 4 can be improved as compared with the case where only glass wool is filled.

Further, since the middle surface materials 13 and 13A are interposed between the glass wool 14 and the foamed polyurethane 15, the glass wool 14 may be crushed by the foaming pressure when the foamed polyurethane 15 is foamed on site. Is prevented. Thereby, the heat insulating performance of the glass wool 14 is ensured, and the thicknesses of the heat insulating box 2 and the doors 3, 4 can be kept uniform.

Although the embodiment has been described by taking as an example a storage cabinet for transporting dishes provided with wheels 6 and moved from a kitchen to a banquet hall, the invention is not limited to this. The present invention is effective. For example, if a battery is mounted in the refrigerator 1 and the blower 26 and the heater 27 are configured to be operated by power supply from the battery, the lunch box is stored in a lunch box manufacturing factory or the like, and is directly used in a transport vehicle or the like. It is also possible to load and deliver to a destination such as a convenience store while keeping the temperature warm.

In the embodiment, the integral heat-insulating box is constituted by the inner and outer surface materials and the middle surface material. However, the present invention is not limited to this. A plurality of heat-insulating walls are constituted by each surface material and the heat insulator, and they are combined. Thus, a storage room may be configured inside.

[0022]

As described in detail above, according to the present invention, a high-temperature resistant heat insulating material is filled between the inner surface material and the inner surface material of the heat insulating wall facing the storage room where the temperature becomes high. Since the foam insulation is filled between the face material and the outer material, the heat insulation of the heat insulating wall is higher than when all the high temperature resistant heat insulating material is filled between the inner material and the outer material of the heat insulating wall. Performance can be significantly improved. Therefore, the thickness of the heat insulating wall can be reduced to increase the volume of the storage room, and also prevent the outer surface material from becoming hot and contribute to energy saving.

Also, due to the heat insulating effect of the high temperature resistant heat insulating material filled between the inner surface material and the inner surface material, the temperature of the inner surface material decreases to the heat resistant temperature of the foamed heat insulating material. There is no inconvenience such as deformation of the foamed heat insulating material between them.
In particular, the foam insulation material is filled between the middle and outer surface materials by the in-situ foaming method and is adhered to them. Strength is also improved. Furthermore, since the middle surface material is interposed between the high-temperature-resistant heat insulating material and the foam heat-insulating material, the pressure at the time of foaming the foam heat-insulating material on site prevents the high-temperature heat-resistant heat material from being crushed. Thereby, the heat insulating performance of the high-temperature resistant heat insulating material can be ensured, and the heat insulating wall can have a uniform thickness.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a storage cabinet according to an embodiment of the present invention.

FIG. 2 is a perspective view of a refrigerator according to the present invention.

FIG. 3 is a perspective view showing a state in which a door of the refrigerator according to the present invention is opened.

FIG. 4 is an enlarged cross-sectional view of the heat-insulating box and door of the refrigerator according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Warmer storage 2 Heat insulation box 3 Door 4 Door 11 (11A) Outer surface material 12 (12A) Inner surface material 13 (13A) Middle surface material 14 Glass wool 15 Foamed polyurethane 16 Storage room 21 Warm passage 26 Blower 27 Electric heater

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsuyoshi Kawaguchi 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-58-175779 (JP, A) 53-31492 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) A47J 39/02 F25D 23/08

Claims (1)

(57) [Claims] 1. A storage room for heating a storage room surrounded by a heat insulating wall, wherein the heat insulating wall has an outer surface material, an inner surface material facing the storage room, and a space between the inner surface material and the outer surface material. A middle face material arranged in the middle face, a high temperature resistant heat insulating material filled between the middle face material and the inner face material, and a foam insulation filled between the middle face material and the outer face material by an in-situ foaming method And a material.